£24 Vcgstathn. 



To 900 yards (running meafure) of tunnelling, including ex* 

 cavations, vaulting with key-ftones, &c. at 12I. per 

 yard, - - £10,800 



To re-laying the bottom with new-made ground, 



000 yards, at il. each, - 900 



To placing lamps and lamp-irons through the tun- 

 nel, collectors' rooms, and gates at each end, - 400 



To making good the entrance roads at each end of 



the tunnel, - 160 



To a fleam-engine to draw off drainage-water, - 1,780 



Neceflary machinery during the execution, - 500 



To ten per cent, upon the whole, for contingencies, 1,415 



Total — £ 15,955 



VEGETATION. 

 IN our firft number (page 109) we ftated that, from fome 

 interefting experiments which had been recently made by 

 Sir Francis Ford, it had been proved that plants fprinkled 

 with water, previoufly impregnated with oxygen gas, grew 

 much more vigoroufly, and difplayed more beautiful tints, 

 than thofe nourifhed with common water. The application 

 of oxygen to promote vegetation has been fince tried in the 

 following fimple manner, and the refult has been the fame 

 as above ftated : Bottles filled with oxygen gas, being firft 

 inverted, have had their mouths buried under ground, near 

 the roots of the plants intended to be fupplied with it. 

 After fome time the gas in the bottles was found reduced to 

 the ftandard of common atmofpheric air : but the oxygen 

 had done its duty ; for the plants that had been thus fup- 

 plied with it were much more healthy and beautiful than 

 others of the fame kinds placed in every other refpect in 

 fimilar circumftances. 



Erratum, Page 192, line 13, for 22d read 2d of December, 



